Gas-Liquid Two Phase Flow Behavior Related to ECLSS
JAXA Supercomputer System Annual Report February 2023-January 2024
Report Number: R23ECWU77
Subject Category: Cooperative Graduate School System
- Responsible Representative: Masato Sakurai, Manager for ECLSS
- Contact Information: Masato Sakurai(sakurai.masato@jaxa.jp)
- Members: Motoharu Kusano, Gaku Murakami, Masato Sakurai
Abstract
Elucidate the effects of gravity on gas-liquid two-phase flows to develop separation techniques for gas-liquid two-phase flows generated by the operation of the Environment Control and Life Support System (ECLSS).
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
In order to evaluate the performance of gas-liquid separation technology, it is necessary to evaluate the microscopic physical phenomena of gas-liquid two-phase flows under microgravity. Large-scale and high-speed numerical simulations are essential for this study on Earth, and the vast computational resources provided by JSS are important.
Achievements of the Year
To develop a gas-liquid separator mechanism for the Sabatier reaction in an air regeneration system, a gas-liquid separator using capillary forces was modeled and its performance was evaluated by numerical simulation ( Fig. 1 ). The operation of the gas-liquid separator was reproduced by combining hydrophilic and hydrophobic particulate porous media and injecting gas-liquid two-phase flow from the top ( Fig. 2 ).
Publications
– Poster Presentations
“Numerical simulation of gas-liquid separation device under gas-rich conditions considering carbon dioxide reduction system” 67th Space Science and Technology Conference
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 144 – 324
- Elapsed Time per Case: 24 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.42
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
---|---|---|
TOKI-SORA | 0.00 | 0.00 |
TOKI-ST | 3335120.88 | 3.60 |
TOKI-GP | 0.00 | 0.00 |
TOKI-XM | 586.95 | 0.32 |
TOKI-LM | 0.00 | 0.00 |
TOKI-TST | 0.00 | 0.00 |
TOKI-TGP | 0.00 | 0.00 |
TOKI-TLM | 0.00 | 0.00 |
File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
---|---|---|
/home | 245.00 | 0.20 |
/data and /data2 | 133020.00 | 0.82 |
/ssd | 2510.00 | 0.24 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 2.73 | 0.01 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
ISV Software Licenses Used
ISV Software Licenses Used(Hours) | Fraction of Usage*2(%) | |
---|---|---|
ISV Software Licenses(Total) | 47.31 | 0.02 |
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2023-January 2024